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Bond Strength of Two Resin Cements on Dentin Using Different Cementation Strategies
Author(s) -
MARQUES MELO RENATA,
ÖZCAN MUTLU,
BARBOSA SILVIA HELENA,
GALHANO GRAZIELA,
AMARAL REGINA,
BOTTINO MARCO ANTONIO,
VALANDRO LUIZ FELIPE
Publication year - 2010
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.2010.00349.x
Subject(s) - bond strength , adhesive , materials science , cementation (geology) , dentin , molar , composite material , primer (cosmetics) , etching (microfabrication) , dentistry , composite number , cement , ultimate tensile strength , layer (electronics) , chemistry , medicine , organic chemistry
Purpose: This study evaluated the microtensile bond strength of two resin cements to dentin either with their corresponding self‐etching adhesives or employing the three‐step “etch‐and‐rinse” technique. The null hypothesis was that the “etch‐and‐rinse” adhesive system would generate higher bond strengths than the self‐etching adhesives. Materials and Methods: Thirty‐two human molars were randomly divided into four groups ( N = 32, n = 8/per group): G1) ED Primer self‐etching adhesive + Panavia F; G2) All‐Bond 2 “etch‐and‐rinse” adhesive + Panavia F; G3) Multilink primer A/B self‐etching adhesive + Multilink resin cement; G4) All‐Bond 2 + Multilink. After cementation of composite resin blocks (5 × 5 × 4 mm), the specimens were stored in water (37°C, 24 hours), and sectioned to obtain beams (±1 mm 2 of adhesive area) to be submitted to microtensile test. The data were analyzed using 2‐way analysis of variance and Tukey's test (α = 0.05). Results: Although the cement type did not significantly affect the results ( p = 0.35), a significant effect of the adhesive system ( p = 0.0001) was found on the bond strength results. Interaction terms were not significant ( p = 0.88751). The “etch‐and‐rinse” adhesive provided significantly higher bond strength values (MPa) with both resin cements (G2: 34.4 ± 10.6; G4: 33.0 ± 8.9) compared to the self‐etching adhesive systems (G1: 19.8 ± 6.6; G3: 17.8 ± 7.2) ( p < 0.0001). Pretest failures were more frequent in the groups where self‐etching systems were used. Conclusion: Although the cement type did not affect the results, there was a significant effect of changing the bonding strategy. The use of the three‐step “etch‐and‐rinse” adhesive resulted in significantly higher bond strength for both resin cements on dentin. CLINICAL SIGNIFICANCE Dual polymerized resin cements tested could deliver higher bond strength to dentin in combination with “etch‐and‐rinse” adhesive systems as opposed to their use in combination with self‐etching adhesives. ( J Esthet Restor Dent 22:262–269, 2010)